Inst ToolsInst ToolsInst Tools
  • Ask
  • Courses
  • Videos
  • Q & A
    • Interview
      • Instrumentation
      • Electronics
      • Electrical
      • Practical Questions
    • MCQ
      • Instrumentation MCQ
      • Electrical MCQ
      • Electronics MCQ
      • Control Systems MCQ
      • Analog Electronics MCQ
      • Digital Electronics MCQ
      • Power Electronics MCQ
      • Microprocessor MCQ
      • Multiple Choice Questions
  • EE
    • Electronics
      • Electronics Q & A
      • Electronic Basics
      • Electronic Devices & Circuits
      • Electronics Animation
      • Digital Electronics
    • Electrical
      • Electrical Basics
      • Electrical Q & A
      • Power Electronics
      • Electrical Machines
      • Electrical Animation
      • Power Systems
      • Switchgear & Protection
      • Transmission & Distribution
  • Measure
    • Control Valves
    • Calibration
    • Temperature
    • Pressure
    • Flow
    • Level
    • Analyzers
    • Switches
    • Vibration
    • Solenoid Valve
  • Control
    • PLC Tutorials
    • Control Systems
    • Safety Instrumented System (SIS)
    • Communication
    • Fire & Gas System
  • More
    • Design
    • Tools
    • Animation
    • Basics
    • Formulas
    • Standards
    • TextBooks
    • Common
    • Software
    • Excel Tools
    • Erection & Commissioning
    • Process Fundamentals
    • Videos
    • Books
Search
All rights reserved. Reproduction in whole or in part without written permission is prohibited.
Reading: How to Test a Pressure Switch ?
Share
Notification Show More
Font ResizerAa
Inst ToolsInst Tools
Font ResizerAa
  • Courses
  • PLC Tutorials
  • Control Systems
Search
  • Ask
  • Courses
  • Videos
  • Q & A
    • Interview
    • MCQ
  • EE
    • Electronics
    • Electrical
  • Measure
    • Control Valves
    • Calibration
    • Temperature
    • Pressure
    • Flow
    • Level
    • Analyzers
    • Switches
    • Vibration
    • Solenoid Valve
  • Control
    • PLC Tutorials
    • Control Systems
    • Safety Instrumented System (SIS)
    • Communication
    • Fire & Gas System
  • More
    • Design
    • Tools
    • Animation
    • Basics
    • Formulas
    • Standards
    • TextBooks
    • Common
    • Software
    • Excel Tools
    • Erection & Commissioning
    • Process Fundamentals
    • Videos
    • Books
Follow US
All rights reserved. Reproduction in whole or in part without written permission is prohibited.
Inst Tools > Blog > Calibration > How to Test a Pressure Switch ?

How to Test a Pressure Switch ?

Last updated: October 8, 2018 12:15 pm
Editorial Staff
Calibration
5 Comments
Share
2 Min Read
SHARE

Accurate calibration of pressure switches is a critical step in ensuring process quality and the safe operation of equipment. The setup is similar to pressure gauge calibration except now a voltage or continuity across a set of switch contacts needs to be read either by a (Digital Multimeter) DMM or the calibrator.

The purpose of the calibration is to detect and correct errors in the set point and deadband of the pressure switch. Calibrators can save you time by reducing steps and reducing the amount of equipment you have to bring to the job. With the right calibrator the entire process can be automated.

How to Test a Pressure Switch ?

To perform the test:

Setup

  • 1. Safely disconnect the device from the process it controls.
  • 2. Connect the calibrator or DMM to the common and NO (normally open) output terminals of the switch. The DMM or calibrator will measure an “open circuit”. if measuring continuity. If measuring V ac be sure the tool is properly rated for the voltage being measured.
  • 3. Connect the pressure switch to a pressure source such as a hand pump connected to a gauge.

Rising pressure

  • 4. Increase the source pressure to the setpoint of the switch until the switch changes state from open to close. Manually record the pressure value when the DMM indicates a “short circuit” or if using a calibrator it will record the value for you.

Falling pressure

  • 5. Continue to increase the pressure until the maximum rated pressure. Slowly reduce the pressure until the switch changes state again, and resets from closed to open, then record the pressure.

Calculation

  • 6. The setpoint pressure was recorded when the pressure was rising. The deadband value is the difference between the rising setpoint pressure and the falling pressure reset point.

Article Source : Fluke

Don't Miss Our Updates
Be the first to get exclusive content straight to your email.
We promise not to spam you. You can unsubscribe at any time.
Invalid email address
You've successfully subscribed !
How to Calibrate Temperature Switch? – Instrument Basics
DP Transmitter Interface Level Measurement Principle, Limitations, Selection, Installation, Design & Calibration
Nuclear Interface Level Measurement Principle, Limitations, Installation and Calibration
Automated Calibration
Level Transmitter Calibration Procedure
Share This Article
Facebook Whatsapp Whatsapp LinkedIn Copy Link
Share
5 Comments
  • Shanmugam Iyappan says:
    October 15, 2016 at 5:31 am

    Nice instruction for the beginners, Thanks!

    Reply
  • Afrojalam says:
    November 25, 2016 at 1:34 pm

    Easy to understand

    Reply
  • Wisdom Samlafo says:
    December 24, 2016 at 8:51 pm

    Great lecture!

    Reply
  • faijul says:
    January 12, 2017 at 12:46 pm

    very nice

    Reply
  • D A Chowdary says:
    January 19, 2017 at 3:21 am

    Thank u for information sharing..

    Reply

Leave a Reply Cancel reply

Your email address will not be published. Required fields are marked *

Stay Connected

128.3kFollowersLike
69.1kFollowersFollow
208kSubscribersSubscribe
38kFollowersFollow

Categories

Recent Comments

  • Kamli on Top Free PLC Software
  • Guifty Shimica on Top Non-PLC Certification Courses for Automation Professionals
  • Guifty Shimica on Top Non-PLC Certification Courses for Automation Professionals
  • MIHARITSOA Aina Sitraka on Top Non-PLC Certification Courses for Automation Professionals

Related Articles

Pressure Gauge Calibration Procedure

Current to Pressure Converter Calibration Procedure

Current to Pressure (I/P) Converter Calibration Procedure

Sensor Trim and Output Trim in Smart Transmitter

What is Sensor Trim and Output Trim in Smart Transmitter?

Step by step guide for Gas Flow Meter Calibration

Step by Step Guide for Gas Flow Meter Calibration

Displacer Level Transmitter Calibration Procedure

Displacer Level Transmitter Calibration using Water & Process Liquid

Calibration Procedure of displacer type Level transmitter

Calibration of Displacer Level Transmitter

transmitter calibration procedure

Transmitter Calibration Procedure

what is calibration

Important Terms in Calibration

More Articles

PID Tuner

Free PID Controller Gains Tuning Tool

On Delay Timer TON in Tia Portal

Timers in PLC Programming – Siemens Tia Portal Tutorials

Preventive Maintenance of Variable Frequency Drive

Preventive Maintenance of Variable Frequency Drive (VFD)

Your First Steps Through STL Language

Your First Steps Through STL Language

Difference Between RS232 and RS485

Difference Between RS232 and RS485

Square-Root extraction in DCS or Transmitter

Square-Root in DCS or Flow Transmitter?

Steam Eductor Question

A Series of False Pressure Alarms

What is Directional Control Valve (DCV)?

What is Directional Control Valve (DCV)?

Follow US
All rights reserved. Reproduction in whole or in part without written permission is prohibited.
Welcome Back!

Sign in to your account

Username or Email Address
Password

Lost your password?